Sound box



Apr. 17, 1923. 1,452,319

C. S. SPITZER ET AL SOUND BOX V Filed May 2, 1921 Patented Apr.17,1923. 1,452,319

CHARLES S. SPITZER AND JOHN GLOUB, OF CHICAGO, ILLINQIS.

SOUND BOX.

Application filed may 2, 1921. Serialito. M698 1.

To all whom it may concern: A characteristic of the invention is that Be it known that we, CHARLES S. SPI'IZER the case is provided with a helicoidal sound- 45 and JOHN GLoUB,bot-h citizens of the United conduit 20 between the chamber and the States, and residents of Chicago, in the tone-arm which has been found, in practice,

5 county of Cook and State of Illinois, have to reproduce the sound from the diaphragm invented certain new and useful Improvein an improved manner. 1 The conduit 20 is ments in Sound Boxes, of which the followflared away from the central portion of the 50 ingdsa full, clear and exact description. case and, commencing at 21, progressively he invention relates to sound boxes. The increases in depth, so'that it extends under a object of the invention is to provide a sound- Wall-portion 22 of the case which extends box by which sound will be reproduced in an over the sound-outlet 23, and the openin 23 improved manner. in the attaching member 7. The entlrely The invention consists in the several novel surrounded portion 24 of the conduit adfeatures hereinafter set forth and more par- 'jacent the outlet 23 is gradually constricted 1 ticularly defined by claim at the conclusion from the chamber 17 to the outlet 23 which hereof. is off-center relatively to the center of the In the drawings: Fig. 1 is a side elevacase. In practice, it has been found that a 06 tion of an instrument embodying the invencase constructed of natural sea-shelL and tion. Fig. 2 is a section taken on line 2-2 having a conduit of the conformation shown 2 of Fig. 1. Fig. 3 is a section taken on line will reproduce the sounds inan improved 33 of Fig. 1. Fig. 4 is a detail of the case manner. 1 1 showin the sound conduit therein. The invention is not to be understood as 65 The lnvention is exemplified in a soundrestricted to the detailsset forth, since these box comprising a case 5 which is preferably may be modified within the scope of the ap- 2 formed of a natural sea-shell and is secured pended claim, without departing from the by one or more screws 6. to a metallic memspirit and scope of the invent-ion. her 7 which is connected by a screw-thread 8 Having thus described the invention, what '7 to a tone-arm 9, which may be of any suitwe claim as new and desire to secure by Letable construction. A diaphragm 10 is held ters Patent, is: 1

between rings 11 in a channelled ring 12,- In a sound-box, the combination of a case, which is screw-threaded to the case and sea diaphragm at one side ofand forming a cures the diaphragm and rings 11 'opera chamber in the case, and a tone arm at its 75 tively in the case 5. A needle 13 in a holder other side, the case being formed with a 14, which is pivotally supported on a bracket helicoidal sound-conduit therein. between 3 15, is operatively connected to the center of said chamber and said connection, said the'diaphragm by an arm 16, as well undersound-conduit on the diaphragm side being stood in the art. The diaphragm is spaced substantially coextensive in area with said 8 from the innerface of the case 5 so as to diaphragm and being progressively conform a sound-chamber 17 The tone-arm 9 stricted toward said tone arm.

is provided with a conduit 18 which forms I a sound-connection for the case and through CHARLES S. SPITZER. wlhfiich the sound will pass to the usual am- JOHN GLOUB.

p 1 er. 

